CN214413081U - Brightness adjusting circuit of smoke ventilator lighting lamp - Google Patents
Brightness adjusting circuit of smoke ventilator lighting lamp Download PDFInfo
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- CN214413081U CN214413081U CN202120915760.0U CN202120915760U CN214413081U CN 214413081 U CN214413081 U CN 214413081U CN 202120915760 U CN202120915760 U CN 202120915760U CN 214413081 U CN214413081 U CN 214413081U
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- 239000000779 smoke Substances 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 43
- 238000005286 illumination Methods 0.000 claims description 26
- 239000003990 capacitor Substances 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 235000019557 luminance Nutrition 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a brightness adjusting circuit of a lighting lamp of a smoke exhaust ventilator, which comprises a power supply, a switch module, a lighting lamp, a sampling module, a comparator module and a control module; the power supply, the switch module, the illuminating lamp, the sampling module and the grounding end are electrically connected in sequence; the control module is electrically connected with one input end of the comparator module, the sampling module is electrically connected with the other input end of the comparator module, and the output end of the comparator module is electrically connected with the switch module; the sampling module is used for collecting voltages at two ends of the sampling module, the control module is used for outputting PWM signals to the comparator module, and the comparator module is used for comparing the voltage sampled by the sampling module and the voltage of the PWM signals output by the control module and outputting control signals to the switch module so as to control the switch module to be switched on or switched off. The utility model discloses can adjust the luminance of smoke ventilator light intelligently.
Description
Technical Field
The utility model belongs to the technical field of the smoke ventilator technique and specifically relates to a brightness control circuit of smoke ventilator light.
Background
The kitchen ventilator is a household appliance specially used for pumping away oil smoke in a kitchen, and is widely applied to families of residents. In order to satisfy the diversified demand of user, the illumination function is attached to current oil smoke pumping machine chance, provides the illumination through the light on the smoke ventilator, and convenience of customers uses smoke ventilator in weak light environment such as night, cloudy day.
In the prior art, the lighting lamp of the range hood has no brightness adjusting function, and the lighting lamp has fixed brightness. When in a low light environment, too bright light is not necessary and power consumption is increased. Existing luminances may again be difficult to meet the lighting needs of a user when in an environment with very low light intensity.
SUMMERY OF THE UTILITY MODEL
The utility model provides a brightness control circuit of smoke ventilator light can the luminance of intelligent regulation smoke ventilator light.
In order to solve the above problem, the utility model adopts the following technical scheme:
the embodiment of the utility model provides a brightness adjusting circuit of a smoke exhaust ventilator illuminating lamp, which comprises a power supply, a switch module, an illuminating lamp, a sampling module, a comparator module and a control module; the power supply, the switch module, the illuminating lamp, the sampling module and the grounding end are electrically connected in sequence; the control module is electrically connected with one input end of the comparator module, the sampling module is electrically connected with the other input end of the comparator module, and the output end of the comparator module is electrically connected with the switch module; the sampling module is used for collecting voltages at two ends of the sampling module, the control module is used for outputting PWM signals to the comparator module, and the comparator module is used for comparing the voltage sampled by the sampling module and the voltage of the PWM signals output by the control module and outputting control signals to the switch module so as to control the switch module to be switched on or switched off.
In some embodiments, the comparator module includes a comparator, a resistor R4, a resistor R5, and a resistor R6; the power supply end of the comparator is electrically connected with the direct-current power supply, the grounding end of the comparator is grounded, and the output end of the comparator is electrically connected with the switch module; two ends of the resistor R4 are respectively and electrically connected with a power supply end and an output end of the comparator; two ends of the resistor R5 are respectively and electrically connected with the positive input end of the comparator and the control module, and two ends of the resistor R6 are respectively and electrically connected with the positive input end of the comparator and the grounding end; and the negative input end of the comparator is electrically connected with the sampling module.
In some embodiments, the switch module comprises a MOS transistor, a resistor R3, and a transistor, wherein a base of the transistor is electrically connected to an output terminal of the comparator, the dc power supply, the resistor R3, and a collector of the transistor are electrically connected in sequence, and an emitter of the transistor is grounded; the source electrode of the MOS tube is electrically connected with the direct current power supply, the grid electrode of the MOS tube is electrically connected with the collector electrode of the triode, and the drain electrode of the MOS tube is electrically connected with the illuminating lamp.
In some embodiments, the sampling module includes a resistor R1 and a resistor R2, the power supply, the switch module, the illumination lamp, the resistor R1 and the ground terminal are electrically connected in sequence, one end of the resistor R1 electrically connected to the illumination lamp is electrically connected to one end of the resistor R2, and the other end of the resistor R2 is electrically connected to the negative input terminal of the comparator.
In some embodiments, the illumination lamp comprises a plurality of LED lamps connected in parallel.
In some embodiments, the negative input of the comparator is electrically connected to the first filter capacitor.
In some embodiments, the positive input of the comparator is electrically connected to the second filter capacitor.
In some embodiments, the brightness adjusting circuit of the range hood illuminating lamp further comprises a key module, and the control module is electrically connected with the key module.
The utility model discloses following beneficial effect has at least: the utility model discloses a control module output PWM signal, the voltage of the PWM signal of the voltage of comparator module comparison sampling module sampling and the output of control module, the voltage of sampling module sampling is greater than the voltage of the PWM signal of control module output, but control module control signal, and then the disconnection of control switch module, the light will be extinguish, the voltage of sampling module sampling is less than the voltage of the PWM signal of control module output, the exportable second control signal of control module, and then the control switch module switches on, the light will be lighted. Therefore, by adjusting the duty ratio of the PWM signal, the time for lighting the illumination lamp and the time for extinguishing the illumination lamp can be controlled, and thus the brightness of the illumination lamp can be intelligently adjusted.
Drawings
Fig. 1 is a schematic block diagram of a brightness adjusting circuit of a lighting lamp of a range hood according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a brightness adjusting circuit of a range hood lighting lamp according to an embodiment of the present invention.
Wherein the reference numerals are: the device comprises a power supply 1, a switch module 2, a lighting lamp 3, a sampling module 4, a comparator module 5, a control module 6 and a key module 7.
Detailed Description
The present disclosure provides the following description with reference to the accompanying drawings to assist in a comprehensive understanding of various embodiments of the disclosure as defined by the claims and their equivalents. The terms and words used in the following description and claims are not limited to the literal meanings, but are used by the inventors to enable a clear and consistent understanding of the disclosure. Accordingly, it will be apparent to those skilled in the art that the following descriptions of the various embodiments of the present disclosure are provided for illustration only and not for the purpose of limiting the disclosure as defined by the appended claims and their equivalents.
The terms "having," "may have," "including," or "may include" used in various embodiments of the present disclosure indicate the presence of the respective functions, operations, elements, etc., disclosed, but do not limit additional one or more functions, operations, elements, etc. Furthermore, it is to be understood that the terms "comprises" or "comprising," when used in various embodiments of the present disclosure, are intended to specify the presence of stated features, integers, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, or groups thereof.
Although terms such as "first" and "second" used in various embodiments of the present disclosure may modify various elements of the various embodiments, the terms do not limit the corresponding elements. For example, these terms do not limit the order and/or importance of the corresponding elements. These terms may be used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the various embodiments of the present disclosure.
It should be understood that when an element (e.g., a first element) is "electrically connected" to another element (e.g., a second element), it means that the two elements are electrically connected for the transmission of electrical energy. One of the elements may be directly electrically connected to the other element, or there may be an intervening element (e.g., a third element) between the element and the other element.
An embodiment of the utility model provides a brightness control circuit of smoke ventilator light, as shown in fig. 1-2, it includes power supply 1, switch module 2, light 3, sampling module 4, comparator module 5 and control module 6. The power supply 1, the switch module 2, the illuminating lamp 3, the sampling module 4 and the grounding end are electrically connected in sequence to form an illuminating circuit. The power supply 1 supplies electric energy, which may be a battery or a dc power converted from commercial power through a power conversion circuit. The illuminating lamp 3 is used for providing illumination, and the sampling module 4 can sample the voltage at two ends of the illuminating lamp. Switch module 2 can switch on or break off, and when switch module 2 switched on, whole lighting circuit switched on, and light 3 can be lighted, and when switch module 2 switched off, light 3 was extinguish promptly.
The comparator module 5 comprises two input ends and an output end, the control module 6 is electrically connected with one input end of the comparator module 5, the sampling module 4 is electrically connected with the other input end of the comparator module 5, and the output end of the comparator module 5 is electrically connected with the switch module 2. The control module 6 may be a single chip or other control chip, which may output a PWM signal to the comparator module 5. The voltage sampled by the sampling module 4 is input to the comparator module 5, and the comparator module 5 compares the voltage sampled by the sampling module 4 with the voltage of the PWM signal output by the control module 6, and outputs a control signal to the switch module 2 according to the comparison result to control the switch module 2 to be turned on or off.
For example, when the voltage sampled by the sampling module 4 is greater than the voltage of the PWM signal output by the control module 6, the control module 6 can output a low level signal, and then the control switch module 2 is turned off, the illumination lamp 3 will be turned off, and when the voltage sampled by the sampling module 4 is less than the voltage of the PWM signal output by the control module 6, the control module 6 can output a high level signal, and then the control switch module 2 is turned on, and the illumination lamp 3 will be turned on. Therefore, by adjusting the duty ratio of the PWM signal, the time when the illumination lamp 3 is turned on and the time when it is turned off can be controlled, and thus the brightness of the illumination lamp 3 can be intelligently adjusted.
In some embodiments, the comparator module 5 includes a comparator, a resistor R4, a resistor R5, and a resistor R6. A power supply terminal of the comparator (i.e., pin 8 of the comparator in fig. 2) is electrically connected to the dc power supply VDD, a ground terminal of the comparator (i.e., pin 4 of the comparator in fig. 2) is grounded, and an output terminal of the comparator (i.e., pin 1 of the comparator in fig. 2) is electrically connected to the switch module 2. The resistor R4 is a pull-up resistor, and both ends of the resistor R4 are electrically connected to the power supply terminal and the output terminal of the comparator, respectively. Two ends of the resistor R5 are electrically connected to the positive input terminal of the comparator (i.e., pin 3 of the comparator in fig. 2) and the control module 6, respectively, and two ends of the resistor R6 are electrically connected to the positive input terminal of the comparator and the ground terminal, respectively. The negative input of the comparator (i.e. pin 2 of the comparator in fig. 2) is electrically connected to the sampling block 4.
In some embodiments, the switch module 2 includes a MOS transistor Q1, a resistor R3, and a transistor Q2, wherein a base of the transistor is electrically connected to an output terminal of the comparator, the dc power VCC, the resistor R3, and a collector of the transistor are electrically connected in sequence, and an emitter of the transistor is grounded. The source electrode of the MOS tube is electrically connected with the direct current power supply, the grid electrode of the MOS tube is electrically connected with the collector electrode of the triode, and the drain electrode of the MOS tube is electrically connected with the illuminating lamp 3.
In this embodiment, the MOS transistor may be an N-channel MOS transistor. When the voltage of the positive input end of the comparator is greater than the sampling voltage, the comparator outputs a high level to drive the triode to be conducted, the gate voltage of the MOS tube is pulled down after the triode is conducted, the MOS tube is conducted, and the illuminating lamp 3 can work. When the voltage of the positive input end of the comparator is smaller than the sampling voltage, the comparator outputs a low level, the triode is cut off, the grid voltage of the MOS tube is pulled high, the MOS tube is cut off, and the illuminating lamp 3 does not work.
Therefore, when the duty ratio of the PWM signal is changed, the lighting time of the illumination lamp 3 is changed, so that the brightness of the illumination lamp 3 can be controlled.
In some embodiments, the sampling module 4 includes a resistor R1 and a resistor R2, the power supply 1, the switch module 2, the illumination lamp 3, the resistor R1 and the ground terminal are electrically connected in sequence, one end of the resistor R1 electrically connected to the illumination lamp 3 is electrically connected to one end of the resistor R2, and the other end of the resistor R2 is electrically connected to the negative input terminal of the comparator. The voltage input to the negative input terminal of the comparator is the voltage across the sampling resistor R1.
Since the resistor R1 and the illuminating lamp 3 are connected in series in the same circuit, the sampled voltage is in a direct proportion relation with the voltage at two ends of the illuminating lamp 3. The control module 6 of this embodiment may further output a reference voltage to the positive input terminal of the comparator, and when the sampling voltage is greater than the reference voltage, the comparator may output a low level signal to control the switch module 2 to be turned off. Therefore, when the current flowing through the illumination lamp 3 is too large, the switch module 2 can be turned off, and the current-limiting protection of the illumination lamp 3 can be realized by the embodiment.
In some embodiments, the illumination lamp 3 includes a plurality of LED lamps connected in parallel, so as to avoid the situation that a single lamp is damaged and cannot provide illumination, as shown in fig. 2, the illumination lamp 3 of the present embodiment includes four LED lamps, which are D1, D2, D3 and Dn.
In some embodiments, the negative input terminal of the comparator is electrically connected to the first filter capacitor C1 to filter the interference signal in the sampled signal and keep the sampled signal clean.
In some embodiments, the positive input terminal of the comparator is electrically connected to the second filter capacitor C2 to filter the interference signal in the PWM signal and keep the PWM signal clean.
In some embodiments, the brightness adjusting circuit of the range hood lighting lamp further comprises a key module 7, and the control module 6 is electrically connected with the key module 7. The key module 7 comprises a brightness adjusting knob fixed on the surface of the range hood, and a user can operate the brightness adjusting knob to change the duty ratio of the PWM signal output by the control module 6, so as to adjust the brightness of the illuminating lamp 3, thereby facilitating the user to actively adjust the brightness of the illuminating lamp 3.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and it is not to be understood that the specific embodiments of the present invention are limited to these descriptions. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement.
Claims (8)
1. The utility model provides a luminance control circuit of smoke ventilator light which characterized in that: the device comprises a power supply, a switch module, a lighting lamp, a sampling module, a comparator module and a control module; the power supply, the switch module, the illuminating lamp, the sampling module and the grounding end are electrically connected in sequence; the control module is electrically connected with one input end of the comparator module, the sampling module is electrically connected with the other input end of the comparator module, and the output end of the comparator module is electrically connected with the switch module; the sampling module is used for collecting voltages at two ends of the sampling module, the control module is used for outputting PWM signals to the comparator module, and the comparator module is used for comparing the voltage sampled by the sampling module and the voltage of the PWM signals output by the control module and outputting control signals to the switch module so as to control the switch module to be switched on or switched off.
2. The brightness adjusting circuit of the range hood lighting lamp according to claim 1, characterized in that: the comparator module comprises a comparator, a resistor R4, a resistor R5 and a resistor R6; the power supply end of the comparator is electrically connected with the direct-current power supply, the grounding end of the comparator is grounded, and the output end of the comparator is electrically connected with the switch module; two ends of the resistor R4 are respectively and electrically connected with a power supply end and an output end of the comparator; two ends of the resistor R5 are respectively and electrically connected with the positive input end of the comparator and the control module, and two ends of the resistor R6 are respectively and electrically connected with the positive input end of the comparator and the grounding end; and the negative input end of the comparator is electrically connected with the sampling module.
3. The brightness adjusting circuit of the range hood lighting lamp according to claim 2, characterized in that: the switch module comprises an MOS (metal oxide semiconductor) tube, a resistor R3 and a triode, wherein the base electrode of the triode is electrically connected with the output end of the comparator, the direct-current power supply, the resistor R3 and the collector electrode of the triode are sequentially and electrically connected, and the emitting electrode of the triode is grounded; the source electrode of the MOS tube is electrically connected with the direct current power supply, the grid electrode of the MOS tube is electrically connected with the collector electrode of the triode, and the drain electrode of the MOS tube is electrically connected with the illuminating lamp.
4. The brightness adjusting circuit of the range hood lighting lamp according to claim 2, characterized in that: the sampling module comprises a resistor R1 and a resistor R2, the power supply, the switch module, the illuminating lamp, the resistor R1 and the grounding end are sequentially electrically connected, one end of the resistor R1, which is electrically connected with the illuminating lamp, is electrically connected with one end of the resistor R2, and the other end of the resistor R2 is electrically connected with the negative input end of the comparator.
5. The brightness adjusting circuit of the range hood illumination lamp according to any one of claims 1 to 4, characterized in that: the illuminating lamp comprises a plurality of LED lamps connected in parallel.
6. The brightness adjusting circuit of the range hood illumination lamp according to any one of claims 2 to 4, characterized in that: and the negative input end of the comparator is electrically connected with the first filter capacitor.
7. The brightness adjusting circuit of the range hood illumination lamp according to any one of claims 2 to 4, characterized in that: and the positive input end of the comparator is electrically connected with the second filter capacitor.
8. The brightness adjusting circuit of the range hood illumination lamp according to any one of claims 1 to 4, characterized in that: the brightness adjusting circuit of the range hood illuminating lamp further comprises a key module, and the control module is electrically connected with the key module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120915760.0U CN214413081U (en) | 2021-04-29 | 2021-04-29 | Brightness adjusting circuit of smoke ventilator lighting lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120915760.0U CN214413081U (en) | 2021-04-29 | 2021-04-29 | Brightness adjusting circuit of smoke ventilator lighting lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214413081U true CN214413081U (en) | 2021-10-15 |
Family
ID=78032669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120915760.0U Expired - Fee Related CN214413081U (en) | 2021-04-29 | 2021-04-29 | Brightness adjusting circuit of smoke ventilator lighting lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214413081U (en) |
-
2021
- 2021-04-29 CN CN202120915760.0U patent/CN214413081U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211015 |